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deps/v8/test/mjsunit/turboshaft/maglev-frontend/store-float-to-smi-field.js

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+// Copyright 2024 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --turbolev --turbofan
+// Flags: --no-always-turbofan
+
+function store_f64_to_smi_field(v) {
+  return {some_unique_name_U5d8Xe: Math.floor((v + 0xffffffff) - 0xfffffffe)}
+          .some_unique_name_U5d8Xe;
+}
+
+%PrepareFunctionForOptimization(store_f64_to_smi_field);
+assertEquals(1, store_f64_to_smi_field(0));
+assertEquals(2, store_f64_to_smi_field(1));
+%OptimizeFunctionOnNextCall(store_f64_to_smi_field);
+assertEquals(2, store_f64_to_smi_field(1));
+assertOptimized(store_f64_to_smi_field);
+
+// Won't fit in Smi anymore, which should trigger a deopt
+assertEquals(0xffffffff+0xffffffff-0xfffffffe,
+            store_f64_to_smi_field(0xffffffff));
+assertUnoptimized(store_f64_to_smi_field);